Machine for making wire fabric



G. E. BULL MACHINE FOR MAKING WIRE FABRIC March 4 5 Sheets-Sheet 1 Mam?4 G. E. BULL MACHINE FOR MAKING WIRE FABRIC Filed Nov. 21 1922 5Sheets-Sheet 2 G. E. BULL MACHINE FOR MAKING WIRE FABRIC March 4 5heets-Sheet 5 W i i Filed March 12%., 1,485,827

a. E. BULL.

MACHINE FOR MAKING WIRE FABRIC Filed NOV. 21 1922 5 Sheets-Sheet 4 March4 G. E. BULL.

MACHINE FOR MAKING WIRE FABRIC 1922 5 Sheets-Sheet 5 Filed Nov. 21

Patented Mar. 4, 1924.

TTS

GEORGE E. BULL, OF MONESSEN, PENNSYLVANIA, ASSIGNOR TO PITTSBURGH STEELCOMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENNSYLV 1MACHINE FOR MAKING WIRE FABRIC.

Application filed November 21, 1922. Serial No. 602,422.

T all 1072 am it may concern:

Be it known that I, GEORGE E. BULL, a citizen of the United States, andresident of Monessen, in the county of VVestmoreland and State ofPennsylvania, have invented a new and useful Improvement in Machines forMakingWire Fabric"; and I do hereby declare the following to be a full,clear, and exact description thereof.

My invention relates to a machine for making wire fabric, and moreespecially a wire fabric having a backing sheet of paper or othersuitable material permanently secured thereto, and generally employed inconstruction work in connection" with the walls and ceilings ofbuildings. Such a fabric is illustrated and described in an applicationfiled by Edward L. Benedict, Serial No. 484,924, July 15, 1921, and theobject of my invention is to provide a machine for producing such fabricincomnlc jcial quantities in sheets of any desired length.

To these ends my invention consists in the novel features hereinafterset forth and,

claimed.

In the accompanying drawings, Fig. 1 is a side elevation; Fig. 2 is alongitudinal section on the line 22, Fig. 3; Fig. 3 is a plan view withthe paper roll omitted; Fig. 4 is an enlarged face view of the crim perbars, looking from the left of Fig. 1;

Fig. 5 is a section on the line 55, Fig. 4;

Fig. 6 is a section on the line 66, 4, showing the tie wire cutter; Fig.7 151111 enlarged detail of a portion of the upper crimping bar, at thecutter end of the bar: Fig.8 is a section similar to Fig. 5. sh0wing thecrimper bars closed together to form the crimp; Fig. 9 is a section onthe line 99, Fig. 8; Fig. 10 is a section similar to Fig. 8 showing thefolding over of the tie wire; Fig. 11 an elevational view of Fig. 8;Fig. 12 is an elevational view of Fig. 10; Fig. 13 an enlarged detailpartly in section of the pulling finger and advancing arm; Figs. 14 and15 are enlarged plan and 7 .end elevational views respectively of saidfinger and arm; Fig. 16 is a sectional. plan of the folding mechanism:Fig. 17 is a detail of the paper holder; Fig. 18 is a plan view of aportion of the finished fabric; and Fig. 19 is a section taken on theline 19-19, Fig. 18; and Fig. 20 is a face view of a portion of theguide bar at the rear of the machine.

suitable frame Ain. which is mounted the main drive shaft 2 in suitablebearings. The fast and loose pulleys 3 are mounted on.the shaft 2 to bedriven from any suitable source of power.

Mounted on the shaft 2 is a pinion 4 which meshes with the gear-wheel 5mounted on the shaft 6.

The gear-wheel 7 on the shaft 6 meshes with the gear-wheel 8 on theshaft 9. A crank 10 is mounted on the end ofgthe shaft 9, and said crankis connected by the pitman v11 with the crank 12 on the stub-shaft 15.Mounted on the stub-shaft 15 is the ratchetwheel 14 with which the pawl13, mounted on the crank-arm 12, engages, and by means of which anintermittent movement is imparted to the shaft 15.

A bevel-gear 16 on the stub-shaft 15 meshes withthe bevel-pinion 17 onthe shaft 18. A gear-wheel'19 on the shaft 18 meshes with the pinion 20on the shaft 21, and a gear-wheel 22 on said shaft 21 meshes with thepinion 23. Mounted on the shaft 21 is the pinch-wheel 21 which, inconjunction with the lower pinch-wheel 25 mounted on the shaft 24, feedsthe threading or tie-wire B, as will more fully hereinafter appear. Agear-Wheel 26 on the shaft 27 meshes with the gear-Wheel 7 on the shaft6 to drive said shaft 27, and a pinion 28 on said shaft 27 meshes withthe gear-wheel 29 on the shaft 30. A pinion 31 on the'shaft meshes withthe spur-gear 32 mounted on the arm 32", said arm being adjustable toprovide for mounting gears of different size thereon to controlthelengths'of the fabric, as'will more fully hereinafter appear.

The spur-gear 32 meshes with the earwheel 33 mounted on the shaft 34.gains 35 are secured to the shaft 34, said cams having. the camways 35.

Upright bars 36 are pivoted at their lower ends at 37, and at the upperends of said bars are the rocking-arms 38 or pullers mounted on a crossrail 36 which connects said arms; said pullers being pivoted on ins 39to a plate 36 mounted on said rail. S pringS 40 are interposed betweensaid rocking arms and the plate 36. The rail and arms form anoscillatory frame G. The rocking-arms 38 are'provided with thehook-portions 38 which are adapted to engage the stay-wires C of thewire-fabric,

which is made up of the said stay wires C and the strand wires D, saidfabric being formed in a roll E, and drawn from said roll to themachine, as will more fully hereinafter appear.

To impart an oscillatory movement to the frame G, and consequently tothe rockingarms 38 to feed the fabric to the machine, cams 41 aremounted on the shaft 6, and said cams engage the idle rollers 36 on thebars 36. Springs 42 (see Fig. 2) connect said bars with the frame, andreturn said bars to normal position.

Longitudinally extending bars 44 are pivotally connected, as at 44,to.the upper ends of bars 43 pivotally mounted on the rod 37. The outerends of the longitudinally extending bars 44 have notches formed thereinto form shoulders 44". Secured to the bars 44 are the blocks 45 havingthe faces 45 which are engaged by the peripheries of the cam discs 35,and by means of which said bars 44 are normally held up so that theirshoulders do not engage the projections 46 on the.

pins 47 which connect the toggle arms 48, the lower ones of which arepivotally mounted on the frame, as at 49, and the upper ones pivotallyconnected at 50 to the cutter blocks 51 mounted in suitable guides inthe frame. A cutter-bar 52 is carried by the cutter-blocks 51 whichcooperates with a stationary cutter-bar 53 mounted in cutterblocks 54 onthe frame.

. Cams 57 and 58 are mounted on the shaft 6, and said cams are arrangedso that the cam 57 will act slightly in advance of the cam 58, and thecam 57 engages one of the bars 43 at one side of the machine while thecam 58 engages the bar 43 at the other side of the machine. In thismanner. when the camways 85 of the cams 35 come around in position wherethe blocks 45 drop into said camways, the shoulders 44 will come downinto position to engage the projections 46 upon the next forwardmovement of the bars 44 and the toggle-arms 48 will be straightened outso as to move the cutter-blocks 51 upwardly to cut the fabric. By havingthe cams 57 and 58 engaging the rollers of the bars 43 one ahead theother, the bar 44 on one side will act slightly in advance of the bar onthe other side, so that the cutter-bar 52 will be raisedinto cuttingposition on one side, followed by the upward movement of the cutter-baron the other side, so that the cutting action -does not take place allat one time and the strain on the cutter-bars is relieved.

The numeral 59 designates a stationary member or cross-rail, and 60 is amovable cross-rail adapted to be moved to and from said stationarycross-rail. The movable cross-rail 60 is mounted on slide-blocks 61which are moved u and down by a toggle comprising the togg e-arms 62 and62. The

Lessee? upper toggle-arm 62 is pivotally connected at 63 to saidsliding-block, and the lower tog- I gle-arm 62 is pivoted to the frameat64. A roller 65 is mounted at the connecting point of the toggle-arms,and said roller is engaged by the cam 66 mounted on the shaft 27.

The cross-rails 59 and (30 are slotted as at (37 and (37 (see Fig. 4) toreceive the former-blocks 68 and 68, respectively. The upperforn'ier-blocks 68 are provided with the recesses 69, and the lowerformer-blocks 68* are provided with the correspondingly shapedprojections 70 adapted to enter said recesses, and said projections 70have the recesses '70 formed therein.

The upper cross-rail 59 has the longitudinally extending groove 71formed therein, and the lower edges of said groove between theformer-blocks has the inclined faces'73. Just beyond each former-block68 the groove 71 has the beveled portion 71 which act to deflect thetie-wire B in case it should extend upwardly at its forward end anddirect it accurately through the crimps, as y will more fullyhereinafter appear. The movable cross-rail 60 has its upper surfacebeclines act to deflect the tie-wire B should itextend downwardly at itsforward end, and guide it accurately through the crimps.

A pair of rocker-arms 78 and 78 are mounted'on the rocker-shaft 7 8mounted in suitable bearings 7 8. The rocker-arm 78 has secured at itslower end the cutter 7 6 which is adapted to cut the tie-wire after ithas been fed the proper distance, as will more fully hereinafter appear.

The lower cross-rail 60 has the folder arms 83 pivotally mounted thereonat 83, the lower ends of said folder-arms being connected by the spring83 which acts to hold said folder-arms normally in a vertical position,as shown in Fig. 4. The upper ends of the folder-arms are adapted toengage the projecting ends of the tie-wire and bend them upwardly intothe position shown in Figs. 8 and 11 when said lower rail rises, and inorder to bend the wire over into the position shown in Figs. 10 and 12to complete the loop, the rocker-arms ,7 8 and 7 8 are each providedwith the fingers 82 having angular nose portions or cams 82 which engagethe rear of the folder-arms, as shown in Fig. 16, and cause saidfolder-arms to pivot inwardly, as shown in Fig. 12, thus bending theupwardly projecting end of the tie-wire into a loop around the crimp. Inorder to support the tie-wire in the forming of this loop, anvil blocks82 are provided which are carried by a bracket 60 on the lower crossrail 60.

To provide for the rocking of the rockshaft 78, the arm 79 is connectedto said shaft and the inner end of'said arm is conre ease? for the throwof the crank, and imparts only a slight movement to the arm 79, or justsufficient movement to permit the rocker arms 78 and 78"" to performtheir proper functions.

Just beyond the pinch-rolls 21 and 25 is the guide 84 through which thetie-wire B passes, and a supplemental guide 85 is provided just beyondsaid guide 84:, said supplemental gulde 85 being shorter than thefirst-named guide, and is readily replaceable in case it wears out.

Straightening rolls 86, 87 and 88 are provided for straightening thefabric as it comes from the roll E, so that it will be deliveredflatwise to the machine.

Above the'straightening rolls, carried by the housin 89, is the roll 90of paper or other suita' le material. A. shaft 91 passes through thecentral opening 92 in the roll, and said shaft rests in forked bearings93 in said housings. Mounted on the shaft 91 are the square taperingplugs 94 which are driven 'into the] ends of t e roll and are thensecured to said shaft by the set screws 95.

Just in front of the straightening rolls are the guides 96 which aresecured to the frame by bolts 97, saidguides being spaced atthesame-distance apart as the strand wire D of the wire-fabric. and saidguides are provided with the notches 98 which are adapted to receive thestrand-wires after the stay-wires C have passed over said guides, and inthis way the accurate feedin of the wire-fabric to t e machine is insure[The operation of the machine is as follows:

Power is applied through the shaft 2 to the pulleys 3 and thewire-fabric is unrolled from the roll E and passed through thestraightening rolls 86, 87 and 88 until said fabric is in position to beengaged by the pullers 38. The pullers, having been brought intoengagement with one of the stay-wires C of the wire-fabric,-the bars 36are moved to the left and the fabric is pulled through the machine. Thisis an intermittent action, as the bars 36 oscillate, and the pusher inmovin to the right. yields so as to allow the hoo 38 to engage thestaywire, as clearly shown in Figs. 1 and '13. In this manner the fabricis advanced the distance between the stay-wires C at each operation ofthe puller.

Each time the fabric comes to rest the lower cross-rail 60 is elevatedby the action of the cam66 on the toggle arms 62 and 62 and as saidcross-rail rises it forms with the upper cross-rail 59 the crimps 100 inthe strand-wires of the fabric by reason of the formers it) entering therecesse 71. Just as soon as the crimps 100 are formed the tie-wire C isadvanced by the pinch rolls 21 and 25, and said tie-wire advancingthrough the guides 84' and 85 enters the groove 71 in the uppercross-rail 59. and in case said wire should be bent slightly upward atits outer end it will strike the beveled face 71 and will be directedstraight through the groove and through the crimps 100, or in case thewire should be bent downwardly it will strike the beveled *faces 72 ofthe lower cross-rail 60,- and will be directed thereby in a straightdirection through the groove 71, so that there Will be no liability ofthe tie-wire missing the crimp and being obstructed so a to prevent thesuccessful operation of the machine.

It should have been stated that the paper F from the roll 90 passingbetween the tension rolls 101 is arranged between the crossrails 59 and60, so that as the lower crossrail is raised the crimp 100 is formed andby the formation of this crimp the paper is also perforated, and whenthe tie-wire passes throughthe' crimps, as above described, it

passe abovethe paper, acting to tie or secure the paper to the fabric.

- At the same time that the lower cross-rail is raised to form the crimpthe folder-arms 83 engage the underside of the projectin ends of thepreceding tie-wire and hen said ends upwardly in the position shown inFig. 10, whereupon the rocker shaft 78 is rocked by the action of thepitman and the arms 78- are moved in toward the cross-rails, said armscarrying the fingers 82 with the cam portions 82 which engage the rearof the folder-arms 83 and causes said folder-arms to pivot inwardly, asshown in Fig. 11. thus bending the upright projecting end into a looparound the crimp on the anvil-block 82".

In thi manner the fabric is fed forward by an intermittent movement, andat each rest period the crimps are formed and the paper perforated andthe tie wire passed through the crimp to secure the paper, while at thesame time the ends of the preceding tieflvire are bent over in the. formof a loop around the outside crimps.

The cutting of the fabric into lengths is accomplished by the knives 52and 53, and as above stated, provision is made for the operating of oneend of'the knife 52 before the other end by the action of the cams 57and 58 in advancing the bars 44, the one slightly ahead of the'other,which will cause the above-described action of the cutter bar. Itis-appa-rent that instead of perforating the paper by means of thecrimps the paper might be previously perforated and brought intointerlocking engagement with the crimps.

What I claim is:

1. In apparatus for attaching sheet-material as a backing forwire-fabric, the combination with a suitable frame, of means foradvancing the fabric, means for forming crimps in the strand-wires ofthe fabric, means for applying the sheet-material, whereby it isperforated by said crimps, and means for threading a wire through saidcrimps.

2. In apparatus for attaching sheet-material as a backing forwire-fabric, the combination with a suitable frame, of means foradvancing the wire-fabric, intermittently. means for forming crimps inthe strand-wires of the wire-fabricymeans for applying thesheet-material, whereby said material is perforated by said crimps, andmeans for threading a wire through said crimps. v

3. In apparatus for attaching sheet-material as a backing forwire-fabric, the combination'with a suitable frame, of a reciprocatinguller adapted to enga e the staywires 0 the fabric to advance t e same,intermittently, means for forming crimps on the strand-wires, meansforapplying the sheet-material, whereby said material is perforated by saidcrimps, and means for threading a wire through said crimps.

4. In apparatus for attaching sheet-material as a backing forwire-fabric, the combination with a suitable frame, of a yieldinglymounted reciprocating puller adapted to engage the said wires of thefabric to impart an intermittent movement to said fabric, meansfor'forming crimpsin the strand-wires of the fabric, means for applyingsheet-material, whereby the said material is perforated by said crimps,and means for threading a wire through said crimps.

5. In apparatus for attaching sheet-material as a backing for wirefabric, the combination with a suitable frame, of an oscillating framemounted therein, means for'oscillating said frame, a yieldingly mountedpuller mounted on said oscillating frame adapted to engage thestay-wires of the fabric to impart an intermittent movement thereto,means for forming crimps in the strandwires of the fabric, means forapplying sheet material, whereby the material is perforated by saidcrimps, and means for threading a wire through said crimps.

6. In ap aratus for attaching sheet material as a acking forwire-fabric, the combination with a suitable frame, of an oscillatoryspring-actuated frame, a cam engaging said frame, a yieldinglymountedpuller on said oscillatory frame adapted to engage the stay-wires-of the fabric to advance the same intermittentl means for formingcrimps in thestran means for applying. sheet-material, whereby saidmaterial is perforated by said crimps,

-w1res of the said fabric,

insane? and means for threading a wire through said crimps.

. 7. In apparatus for attachingsheet material as a acking for wirefabric, the combination with a suitable frame, of a yieldingly mountedpuller having a hook portion adapted to engage a stay-wire of the.fabric, means for reciprocating saidpuller to impart an intermittentmovement to said fabric, means for forming crimps in the strandwires ofsaid fabric, means for applying sheet-material, whereby said material isperforatedby said crimps, and means for threading a wire through saidcrimps.

8. In apparatus for attaching sheet material as a backing forwire-fabric, the combination with a suitable frame, of means foradvancing the wire-fabric, means for forming crimps in the strand-wiresof said fabric, means for applying sheet-material, whereby said materialis perforated by said crimps, means for threading a wire through thecrimps, and means for severing said threading wire.

9., In apparatus for attaching sheet material as a backing forwire-fabric, the combination with a suitable frame, of means foradvancing a wire-fabric, means for forming crimps in the stay-wires ofsaid fabric, means for applyingsheet material, whereby said material isperforated by said crimps, means for threading a wire through saidcrimps, and means for folding over the ends of said threading wire.

10. In a paratus for attaching sheet-ma terial as a acking forwire-fabric, the combination with a suitable frame, of means foradvancing the wire-fabric, means for forming crimps in the strand-wiresof said fabric, means for applying sheet-material, whereby said materialis erforated by said crimps, means for threading a wire through saidcrimps, and means beyond said crimping, means for folding over the endsof said threading wire.

11. In apparatus for attaching sheet-material as a backing forwire-fabric, the combination with a suitable frame,'of means foradvancing the wire-fabric, members having crimping dies movable the onewith reference to the other,

in the strand wires of said fabric, means for whereby crimps are formedV applying sheet material between said memhers, whereby said material isperforated in the forming of the crimps, and means for threading a wirethrough said crimps.

12. In a paratus for attachin terial as a tacking-for wire-fabric, thecombination with a suitable frame, of means for advancin thewire-fabric, an upper stationary mem er having a longitudinallyextending groove formed therein, and crimp-forming notches, a lowermovable member having projections adapted to enter said notches,

said projections being -recesseiil, means vfor sheet ma-J ins-ease?applying sheet material between said movable members, means for raisingsaid lower member, whereby crim s are formed in the strand-wires of thefabric, and said sheet material perforated, and means for threading awire through the crimps formed by said movable members. v

13. In a paratus for attaching sheet material as a acking forwire-fabric, the combination with a suitable frame, of means foradvancing the wirerfabric, a stationary upper member having alongitudinally extendin groove and crimp-forming notches formed atintervals therein, a lower movable member having rojections coincidingwith said notches, said projection being recessed, means for applyingsheet material between said members, means for raising said lowermember, whereby crimps are formed in the strand-wires of said fabric,

and said sheet material perforated thereby, means for threading a wirethrough said crimps, and folding means carried by said movable member inadvance thereof adapted to engage the ends of the preceding threadingwire.

14. In a paratus for attaching sheet material as a backing for wirefabric, the combination with a suitable frame, of means for feeding thewire fabric, a stationary memher having a longitudinally extendinggroove and crimp-forming notches formed at intervals therein, a movablemember having projections coinciding with said notches, said projectionsbeing recessed, means for applying sheet material between said mem bers,means for raisin said lower member, whereby crimps are ormed in thestrand wires of the fabric and said sheet material perforated thereby,means for threading a wire throu h said crimps, a pivotally mountedfoIder carriedv by said movable member in advance thereof adapted toengage the projectin ends of the preceding threading wire, and means formoving said folder on its pivot to bend said projecting ends inwardly.

15, In a paratus for attachin sheet material as a backing for wirefabric, the combination with a suitable frame, of means for advancingthe wire fabric, a stationary member with a longitudinally extendinggroove formed therein and crimp-forming notches at intervals, a movablemember having projections coinciding with said notches, said projectionsbeing recessed, means for applying the sheet material between said memers, means for raising said movable member whereby crimps are formed inthe strand wires of said fabric, and said sheet material perforatedthereby, means for threading a wire through said crimps, pivotallymounted folders carried by said movable member adaptedto engage theprojecting ends of the preceding threading wire, rocker members mountedin said frame having cam portions adapted to engage said folders to movesaid folders inwardly on their pivots to fold over said projecting endsof the threading wire, and means for operating said rocker members. v

16. In apparatus for attaching sheet material as a backing for wirefabric, the combination with a suitable frame, of means for advancingthe wire fabric, a stationary member having a longitudinally extendinggroove, and notches at intervals adapted to receive crimps on thestrand-wires, the portions of said groove between said notches havingbeveled faces just beyond said notches, a movable member havingprojections coinciding with said notches, said projections beingrecessed, said movable member having angular inclined faces between saidprojections and inclined faces on the upper member with which theinclined faces on the lower member engage, means for applying sheetmaterial between said members, means for raising said lower member,whereby said sheet member is perforated b said crimps, and means fordirecting a t reading wire through said crimps when said lower member israised.

17. In a paratus for attaching sheet material as a backing forwire-fabric, the combination with a suitable frame, of means foradvancing the wire-fabric, a stationary member having a groove extendinglongitudinally thereof, and notches at intervals adapted to receive crims on the strandwires, a movable member aving projections coinciding withsaid notches, said projections being recessed, means for applying sheetmaterial between said members, a toggle connected to said movablemember, a

shaft, a cam on said shaft enga ing said toggle, means for feeding athrea ing wire through the crimps formed by said members, pivotallymounted folders carried by said movable member in advance thereofadapted to engage the projecting ends of the preceding threading wire,rocker members, a rocker shaft, a pit-man connected to said first-namedshaft having a slot formed therein, an armconnecting said rock shaftwith said pitman, said arm engaging said slot, and a cam carried by saidrocker member adapted to engage said folder to move the same on itspivot over in folding position.

18. In aparatus for attaching sheet material as a acking for wirefabric, the combination with a suitable frame, of means for advancingthe wire fabric, means for forming crimps in the strand-wires of saidfabric, means for applying sheet-material,

whereby said material is perforated by said crimps, means for threadinga wire through ltd ' crimps, a

said crimps, and cutting mechanism beyond "said crimp-forming means forcutting the fabric into lengths.

19. In apparatus for attaching sheet material as a backing for wirefabric, the combination with a suitable frame, of means for formingcrimps in the strand-wires of said fabric, means for applying sheetmaterial, whereby said material is perforated by said crimps, means forthreading wire through said crimps, cutter-mechanism for cutting saidfabric into suitable lengths, comprising a stationary and a movableknife, means for elevating one end of said knife and then raising theopposite end.

'- 20. In apparatus for-attaching sheet material as a backing for wirefabric, the combination with a suitable frame, of means for advancingthe wire fabric, means for forming crimps in the strand-wires of saidfabric,

means for applying sheet-material, whereby said material is perforatedby said crimps, means for threading a wire through the reciprocatingbar, cutting mechanism for cutting the fabric into lengths comprising astationary cutter bar and a m'ovable cutter bar, a toggle connected tosaid movable cutter-bar, said reciprocating bar bein normally out ofengagement with said togge, and means for bringing said bar intoengagement with said toggle to operate same to raise said movablecutter-bar.

2].. ln apparatus for attaching sheet materialas a backing for wirefabric, the combination with a suitable frame, of means for advancingthe wire-fabric, means for forming crimps in the strand-wire thereof,means for applying sheet material, whereby said material is perforated bsaid crimps, means for threading a. wire tirough said crimps, cuttingmechanism for cutting said fabric into lengths, said cutting mechanismcoinprising astationary cutter bar and a movable cutter bar, a. toggleconnected to the said movable cutter bar, a projection at the togglejoint, a reciprocating bar having a shoulder normally held out ofengagement with said projection, a cam engaging said reciprocating barhaving a camway whereby said bar is lowered to bring said shoulder intoengagement with said projection to opcutting mechanism A toggle arms,

31 Add ,837

(grate said toggle to raise said movable cutter- 22. In apparatus forattaching sheet material as a backing for wire fabric, the com.-bination with a suitable frame, of means for advancing wire fabric,means for forming crimps in the strand-wires thereof, means for applyingsheet material, whereby said material is perforated by for threading awire through sai crimps,

for cutting the fabric into lengths comprising a stationary cutter barand a movable cutter bar, toggles connected to said movable cutter-barhaving projections at the points of connection of the longitudinallyextending bars having shoulders normally out of engagement with saidprojections, cams engaging said longitudinally extendin bars, havingcamways to permit said shou ders to engage said projections, the ends ofsaid bars being connected independently to pivotally mounted uprightmembers, and cams adapted to engage said members to advance said bars,said cams being ofiset with relation to each other, whereb one of saidbars is advanced slightly in a Vance of the other, whereby one end ofthe movable cutter bar is raised previous to the other.

23 In apparatus for attaching sheet material as a backing for wirefabric, the combination with a suitable frame, of means for advancingthe fabric, means for forming crimps in the strand wires of the fabric,means for applying the sheet material, whereby-it is perforated by thecrimping operation and means for threading a wire through said crimps.

24. In apparatus for attaching sheet material as a backing for wirefabric, the combination with a suitable frame, of means for advancingthe fabric, means for forming crimps in the strand wires of the fabric,means for bringing the sheet material into interlocking engagement withsaid crimps, and means for threading a wire through said crimps.

lln testimony whereof l, the said GEORGE E. Bonn, have hereunto set myhand. 1

GEURGE E. BULL.

sa l crim s, means ill)

